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Multilayered Electromagnetic Interference Shielding Structures for Suppressing Magnetic Field Coupling

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Abstract

Control of electromagnetic interference (EMI) represents a major challenge for emerging consumer electronics, the Internet of Things, automotive electronics, and wireless communication systems. This paper discusses innovative EMI shielding materials and structures that offer higher shielding effectiveness compared with copper. To create high shielding effectiveness in the frequency range of 1 MHz to 100 MHz, multilayered shielding topologies with electrically conductive and nanomagnetic materials were modeled, designed, fabricated, and characterized. In addition, suppression of out-of-plane and in-plane magnetic-field coupling noise with these structures is compared with that of traditional single-layer copper or nickel–iron films. Compared with single-layered copper shields, multilayered structures consisting of copper, nickel–iron, and titanium showed a 3.9 times increase in shielding effectiveness in suppressing out-of-plane or vertically coupled noise and 1.3 times increase in lateral coupling. The superiority of multilayered thin-film shields over conventional shielding enables greater design flexibility, higher shielding effectiveness, and further miniaturization of emerging radiofrequency (RF) and power modules.

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Authors and Affiliations

  1. Packaging Research Center, Georgia Institute of Technology, 813 Ferst Dr NW, Atlanta, GA, 30332, USA

    Atom O. Watanabe, Pulugurtha Markondeya Raj & Rao Tummala

  2. Tango Systems, San Jose, CA, USA

    Denny Wong & Ravi Mullapudi

Authors
  1. Atom O. Watanabe
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  2. Pulugurtha Markondeya Raj
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  3. Denny Wong
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  4. Ravi Mullapudi
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  5. Rao Tummala
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Correspondence to Atom O. Watanabe.

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Watanabe, A.O., Raj, P.M., Wong, D. et al. Multilayered Electromagnetic Interference Shielding Structures for Suppressing Magnetic Field Coupling. J. Electron. Mater. 47, 5243–5250 (2018). https://doi.org/10.1007/s11664-018-6387-2

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  • DOI: https://doi.org/10.1007/s11664-018-6387-2

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